Bloodless Diabetes Monitoring

A new approach of making the glucose sensor is by using the microwave circuit that generates the electromagnetic waves. when ever a persons finger is placed on the chip, change in the electrical properties of the thumb is observed. these changes were used in the measurements of glucose level [1].
Fig(1). Spiral shaped glucose sensor
the energy change on the thumb places over the above shown sensor is because of blood, muscle, fat, skin, and glucose. so, when the spectrum is filtered in broad frequency range estimation of required biological constraint level is possible

References:
[1]An article from technology review called " Bloodless Diabetes Monitoring-A new noninvasive tool uses electromagnetic waves to measure glucose levels" by Jennifer Chu.